var api_key = {
    authType: 'password',
    clientId: 'foo',
    clientSecret: 'foo'
};

var podio_api = require('../node_modules/podio-js/lib/podio-js');
var podio = new podio_api (api_key);

var username = 'foo';
var password ='foo';

var callback = function (err, responsedata) {

    if (err) throw (err);
    console.log (responsedata);
};

podio.authenticateWithCredentials (username, password, callback);

{ access_token: 'foo',
  expires_in: 28800,
  token_type: 'bearer',
  scope: 'global:all',
  ref: { type: 'user', id: 999999 },
  refresh_token: 'foo' }